Error using griddedInterpolant. The grid vectors must contain unique points

Question

Nina Jensen 2017-5-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338537-error-using-griddedinterpolant-the-grid-vectors-must-contain-unique-points

评论： Walter Roberson 2017-7-13

采纳的回答： Harsh

在 MATLAB Online 中打开

I get the error "Error using griddedInterpolant. The grid vectors must contain unique points"

My script is:

 %interpolating modelled at observed depth
 for j = 1:length(time_obs)
 T_subsurf_mod(:,j) = interp1(depth_act(:,j),T_ice(:,j),depth_obs(:,j));
 end

T_subsurf_mod and depth_obs are both 11x8784 double and depth_act is a 201x8784 double.

I have tried using the function "unique" on my input but does not work.

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Adam 2017-5-3

Well, the error message is pretty explicit and seeing your code doesn't really help us with that in any way! What do you mean by using unique 'doesn't work'?

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Answer 1

Harsh 2017-5-11

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https://ww2.mathworks.cn/matlabcentral/answers/338537-error-using-griddedinterpolant-the-grid-vectors-must-contain-unique-points#answer_266651

Hello Nina,

If you still need help with this, please contact MathWorks Technical Support here: https://www.mathworks.com/support/contact_us/

Please be sure to provide a detailed description of the issue and attach any relevant files / code / examples required to investigate the issue.

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Justin Miron 2017-6-22

Would you be able to tell us how you solved it? I'm getting the same issue.

Walter Roberson 2017-6-22

Justin, what happened when you used code along the lines of what I suggested?

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Answer 2

Walter Roberson 2017-5-11

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https://ww2.mathworks.cn/matlabcentral/answers/338537-error-using-griddedinterpolant-the-grid-vectors-must-contain-unique-points#answer_266689

在 MATLAB Online 中打开

 %interpolating modelled at observed depth
 for j = 1:length(time_obs)
   [~, uidx] = unique(depth_act(:,j));
   T_subsurf_mod(:,j) = interp1( depth_act(uidx,j), T_ice(uidx,j), depth_obs(:,j) );
 end